Made of flexible spring steel, cold rolled, hardened and tempered. Chamfered ends simplify insertion. Handy kit for shop toolroom or toolbox. On hand when needed saves time and money. Plastic compartment box is easy to store. The Precision Brand® 287 Piece Metric Roll Pin Asst contains: 10 each of 1.5 and 2mm diameters by 6mm, 10mm, 12mm, and 20mm; 8 each of 3mm diameter by 10mm, 18mm, 24mm, 30mm, and 40mm; 7 each of 4mm diameter by 10mm, 18mm, 22mm, 26mm, 30mm, and 40mm; 8 each of 5mm diameter by 14mm, 18mm, 26mm, 30mm, 40mm, and 50mm; 7 each of 6mm diameter by 20mm, 24mm, 30mm, 40mm, and 50mm: 5 each of 8mm diameter by 20mm, 30mm, 40mm, 50mm, and 65mm; 5 each of 10mm diameter by 40mm; and 3 each of 10mm diameter by 45mm, 50mm, 65mm, and 80mm.